是java/kotlin中的文件线程安全吗

Question

我在Kotlin中有一个文件实例，该实例是本地的。我只想知道多个线程/共同路线是否可以同时访问此文件实例并写入它。输出文件中缺少一些行，这可能是原因。

由于文件实例是本地的，因此每个线程/共同访问都应该具有自己的实例，并且不应存在这样的问题IMO。

private val noOfThreads = newFixedThreadPoolContext(nThreads = 3, name = "coRoutineThreads")
val nameOfFile = "test.csv"
fun coRoutineFunction(){
    runBlocking{
        for(i in 1..100)
        {
            async(noOfThreads){
               writeToFile(nameOfFile)
            }
        }
    }
}

fun writeToFile(nameOfFile){
    val file = File(fileName)
    //write to file using bufferedWriter and CSVPrinter
}

原始的writetofile将使文件名和数据添加到文件中。如果不存在文件，它将创建新文件，否则将附加。

internal fun writeToFile(fileName: String, recordList: List<Map<String, String>>) {
try {
    val file = File(fileName)
    if (!file.exists()) {
        file.createNewFile()
        val writer = FileWriter(file)
        val bufferedWriter = BufferedWriter(writer)
        writeCSVRecordWithHeader(bufferedWriter, recordList)
        bufferedWriter.close()
    } else {
        val writer = FileWriter(file, true)
        val bufferedWriter = BufferedWriter(writer)
        concCSVRecord(bufferedWriter, recordList)
        bufferedWriter.close()
    }
} catch (exception: Exception) {
    logger.error("Exception at writeRecordsToFile while creating file: ${ExceptionUtils.getStackTrace(exception)}")
    throw exception
}